Description: High speed and stable transmission are supported by bluetooth-compatible 5.1 chip. It is built in large-capacity battery and has a long standby time. LED digital display will make you become aware of the status of power. It will connect to bluetooth-compatible automatically after the first successful bluetooth-compatible matching. It is made of premium ABS and electronic component material, the wireless bluetooth-compatible earphone is reliable and durable. The length of the product is 7cm, the width is 5cm, the height is 2cm. It is suitable for you to use it for home, office, travel, sports, etc. Item Name: bluetooth-compatible Earphone Material: ABS,Electronic Component Batteries: Built-in 35mAh Rechargeable Battery(Included) Charging Time: about 1.5H Playback Time: about 5h (80% Volume) Frequency Response: 20-2KHz Waterproof Grade: Life Waterproof Transmission Distance: 10 meters (Barrier-free) Bluetooth Version: 5.1 Charging Compartment Battery Capacity: 1200mAh Agreement: A3DP/AVRCP/HHFP/HSP Features: Wireless, Rechargeable, Durable Horn Specifications: 13mm Moving-coil Speaker Size Details: 7cm x 5cm x 2cm/2.76" x 1.97" x 0.79" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Pair of bluetooth-compatible Earphone 1 x Charging Compartment 1 x USB Charging Cable